<?php
/**
 * Created by PhpStorm.
 * User: 66diqiu-li
 * Date: 14-10-14
 * Time: 下午5:37
 */
/**
 * 仿写CodeIgniter的FTP类
 * FTP基本操作：
 * 1) 登陆; 			connect
 * 2) 当前目录文件列表;  filelist
 * 3) 目录改变;			chgdir
 * 4) 重命名/移动;		rename
 * 5) 创建文件夹;		mkdir
 * 6) 删除;				delete_dir/delete_file
 * 7) 上传;				upload
 * 8) 下载				download
 *
 * @author quanshuidingdang
 */
class Ftp {

    private $hostname	= '';
    private $username	= '';
    private $password	= '';
    private $port 		= 21;
    private $passive 	= TRUE;
    private $debug		= TRUE;
    private $conn_id 	= FALSE;
    private $file_list  = array();

    /**
     * 构造函数
     *
     * @param	array	配置数组 : $config = array('hostname'=>'','username'=>'','password'=>'','port'=>''...);
     */
    public function __construct($config = array()) {
        if(count($config) > 0) {
            $this->_init($config);
		}
	}

    /**
     * FTP连接
     *
     * @access 	public
     * @param 	array 	配置数组
     * @return	boolean
     */
    public function connect($config = array()) {
        if(count($config) > 0) {
            $this->_init($config);
		}

		if(FALSE === ($this->conn_id = @ftp_connect($this->hostname,$this->port))) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_connect");
			}
			return FALSE;
		}

		if( ! $this->_login()) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_login");
			}
			return FALSE;
		}

		if($this->passive === TRUE) {
            ftp_pasv($this->conn_id, TRUE);
		}

		return TRUE;
	}


    /**
     * 目录改变
     *
     * @access 	public
     * @param 	string 	目录标识(ftp)
     * @param	boolean
     * @return	boolean
     */
    public function chgdir($path = '', $supress_debug = FALSE) {
        if($path == '' OR ! $this->_isconn()) {
            return FALSE;
        }

		$result = @ftp_chdir($this->conn_id, $path);

		if($result === FALSE) {
            if($this->debug === TRUE AND $supress_debug == FALSE) {
                $this->_error("ftp_unable_to_chgdir:dir[".$path."]");
			}
			return FALSE;
		}

		return TRUE;
	}

    /**
     * 目录生成
     *
     * @access 	public
     * @param 	string 	目录标识(ftp)
     * @param	int  	文件权限列表
     * @return	boolean
     */
    public function mkdir($path = '', $permissions = NULL) {
        if($path == '' OR ! $this->_isconn()) {
            return FALSE;
        }

		$result = @ftp_mkdir($this->conn_id, $path);

		if($result === FALSE) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_mkdir:dir[".$path."]");
			}
			return FALSE;
		}

		if( ! is_null($permissions)) {
            $this->chmod($path,(int)$permissions);
		}

		return TRUE;
	}

    /**
     * 上传
     *
     * @access 	public
     * @param 	string 	本地目录标识
     * @param	string	远程目录标识(ftp)
     * @param	string	上传模式 auto || ascii
     * @param	int		上传后的文件权限列表
     * @return	boolean
     */
    public function upload($localpath, $remotepath, $mode = 'auto', $permissions = NULL) {
        if( ! $this->_isconn()) {
            return FALSE;
        }

		if( ! file_exists($localpath)) {
            if($this->debug === TRUE) {
                $this->_error("ftp_no_source_file:".$localpath);
			}
			return FALSE;
		}

		if($mode == 'auto') {
            $ext = $this->_getext($localpath);
			$mode = $this->_settype($ext);
		}

		$mode = ($mode == 'ascii') ? FTP_ASCII : FTP_BINARY;

		$result = @ftp_put($this->conn_id, $remotepath, $localpath, $mode);

		if($result === FALSE) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_upload:localpath[".$localpath."]/remotepath[".$remotepath."]");
			}
			return FALSE;
		}

		if( ! is_null($permissions)) {
            $this->chmod($remotepath,(int)$permissions);
		}

		return TRUE;
	}

    /**
     * 下载
     *
     * @access 	public
     * @param 	string 	远程目录标识(ftp)
     * @param	string	本地目录标识
     * @param	string	下载模式 auto || ascii
     * @return	boolean
     */
    public function download($remotepath, $localpath, $mode = 'auto') {
        if( ! $this->_isconn()) {
            return FALSE;
        }

		if($mode == 'auto') {
            $ext = $this->_getext($remotepath);
			$mode = $this->_settype($ext);
		}

		$mode = ($mode == 'ascii') ? FTP_ASCII : FTP_BINARY;

		$result = @ftp_get($this->conn_id, $localpath, $remotepath, $mode);

		if($result === FALSE) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_download:localpath[".$localpath."]-remotepath[".$remotepath."]");
			}
			return FALSE;
		}

		return TRUE;
	}

    /**
     * 重命名/移动
     *
     * @access 	public
     * @param 	string 	远程目录标识(ftp)
     * @param	string	新目录标识
     * @param	boolean	判断是重命名(FALSE)还是移动(TRUE)
     * @return	boolean
     */
    public function rename($oldname, $newname, $move = FALSE) {
        if( ! $this->_isconn()) {
            return FALSE;
        }

		$result = @ftp_rename($this->conn_id, $oldname, $newname);

		if($result === FALSE) {
            if($this->debug === TRUE) {
                $msg = ($move == FALSE) ? "ftp_unable_to_rename" : "ftp_unable_to_move";
                $this->_error($msg);
			}
			return FALSE;
		}

		return TRUE;
	}

    /**
     * 删除文件
     *
     * @access 	public
     * @param 	string 	文件标识(ftp)
     * @return	boolean
     */
    public function delete_file($file) {
        if( ! $this->_isconn()) {
            return FALSE;
        }

		$result = @ftp_delete($this->conn_id, $file);

		if($result === FALSE) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_delete_file:file[".$file."]");
			}
			return FALSE;
		}

		return TRUE;
	}

    /**
     * 删除文件夹
     *
     * @access 	public
     * @param 	string 	目录标识(ftp)
     * @return	boolean
     */
    public function delete_dir($path) {
        if( ! $this->_isconn()) {
            return FALSE;
        }

		//对目录宏的'/'字符添加反斜杠'\'
		$path = preg_replace("/(.+?)\/*$/", "\\1/", $path);

		//获取目录文件列表
		$filelist = $this->filelist($path);

		if($filelist !== FALSE AND count($filelist) > 0) {
            foreach($filelist as $item) {
                //如果我们无法删除,那么就可能是一个文件夹
                //所以我们递归调用delete_dir()
                if( ! @delete_file($item)) {
                    $this->delete_dir($item);
				}
            }
        }

		//删除文件夹(空文件夹)
		$result = @ftp_rmdir($this->conn_id, $path);

		if($result === FALSE) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_delete_dir:dir[".$path."]");
			}
			return FALSE;
		}

		return TRUE;
	}

    /**
     * 修改文件权限
     *
     * @access 	public
     * @param 	string 	目录标识(ftp)
     * @return	boolean
     */
    public function chmod($path, $perm) {
        if( ! $this->_isconn()) {
            return FALSE;
        }

		//只有在PHP5中才定义了修改权限的函数(ftp)
		if( ! function_exists('ftp_chmod')) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_chmod(function)");
			}
			return FALSE;
		}

		$result = @ftp_chmod($this->conn_id, $perm, $path);

		if($result === FALSE) {
            if($this->debug === TRUE) {
                $this->_error("ftp_unable_to_chmod:path[".$path."]-chmod[".$perm."]");
			}
			return FALSE;
		}
		return TRUE;
	}

    /**
     * 获取目录文件列表
     *
     * @access 	public
     * @param 	string 	目录标识(ftp)
     * @return	array
     */
    public function filelist($path = '.') {
        if( ! $this->_isconn()) {
            return FALSE;
        }

        $data = ftp_nlist($this->conn_id, $path);
        if(!empty($data)){
            foreach($data as $val){
                if($val!='.'&&$val!='..'){
                    if(strpos($val,'.')>-1){
                        $this->file_list[] = array(
                            'url' => URLPIC.$path.'/'.$val,
                            'mtime'=> filemtime($path.'/'.$val),
                        );
                    }else{
                        $this->filelist($path.$val);
                    }
                }
            }
        }
        return $this->file_list;
		//return ftp_nlist($this->conn_id, $path);
	}

    /**
     * 关闭FTP
     *
     * @access 	public
     * @return	boolean
     */
    public function close() {
        if( ! $this->_isconn()) {
            return FALSE;
        }

		return @ftp_close($this->conn_id);
	}

    /**
     * FTP成员变量初始化
     *
     * @access	private
     * @param	array	配置数组
     * @return	void
     */
    private function _init($config = array()) {
        foreach($config as $key => $val) {
            if(isset($this->$key)) {
                $this->$key = $val;
			}
		}

		//特殊字符过滤
		$this->hostname = preg_replace('|.+?://|','',$this->hostname);
	}

    /**
     * FTP登陆
     *
     * @access 	private
     * @return	boolean
     */
    private function _login() {
        return @ftp_login($this->conn_id, $this->username, $this->password);
	}

    /**
     * 判断con_id
     *
     * @access 	private
     * @return	boolean
     */
    private function _isconn() {
        if( ! is_resource($this->conn_id)) {
            if($this->debug === TRUE) {
                $this->_error("ftp_no_connection");
			}
			return FALSE;
		}
		return TRUE;
	}

    /**
     * 从文件名中获取后缀扩展
     *
     * @access 	private
     * @param 	string 	目录标识
     * @return	string
     */
    private function _getext($filename) {
        if(FALSE === strpos($filename, '.')) {
            return 'txt';
        }

        $extarr = explode('.', $filename);
        return end($extarr);
    }

    /**
     * 从后缀扩展定义FTP传输模式  ascii 或 binary
     *
     * @access 	private
     * @param 	string 	后缀扩展
     * @return	string
     */
    private function _settype($ext) {
        $text_type = array (
            'txt',
            'text',
            'php',
            'phps',
            'php4',
            'js',
            'css',
            'htm',
            'html',
            'phtml',
            'shtml',
            'log',
            'xml'
        );

        return (in_array($ext, $text_type)) ? 'ascii' : 'binary';
    }

    /**
     * 错误日志记录
     *
     * @access 	prvate
     * @return	boolean
     */
    private function _error($msg) {
        return @file_put_contents('ftp_err.log', "date[".date("Y-m-d H:i:s")."]-hostname[".$this->hostname."]-username[".$this->username."]-password[".$this->password."]-msg[".$msg."]\n", FILE_APPEND);
	}

    /**
     *
     * 批量创建文件夹
     * @param $dir
     * @param $obj
     * @param int $mode
     * @return bool
     */
    function dmkdir($dir,$mode = 0777)
    {
        if(!is_dir($dir))
        {
            $this->dmkdir(dirname($dir), $mode);
            $this->mkdir($dir, $mode);
        }
        return true;
    }

}
